1.

calculate the resistivity of a copper wire of length 3m and cross section 1.8×10-5 m2 and the resistance of wire is 4×10-3 ohm​

Answer» Given,

length= 3 m

Area of cross-section= 1.8×10⁻⁵ m²

Resistance= 4×10⁻³ ohms

Now,

Resistivity = R × A / l

Resistivity = 4×10⁻³ × 1.8 × 10⁻⁵ / 3

Resistivity = 4 × 0.6 × 10⁻⁸

Resistivity = 2.4 × 10⁻⁸ ohm-meter


Discussion

No Comment Found

Related InterviewSolutions